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'Risk and Safety Statements', also known as 'R/S statements', 'R/S numbers', 'R/S phrases', and 'R/S sentences', is a system of hazard codes and phrases for labeling dangerous chemicals and compounds. The R/S statement of a compound consists of a risk part (R) and a safety part (S), each followed by a combination of numbers. Each number corresponds to a phrase. The phrase corresponding to the letter/number combination has the same meaning in different languages—see 'in other languages' on the left.

Contents

Example

See also

External links

Example

The R/S statement code for fuming hydrochloric acid (37%):
: R: 34-37 S: 26-36-45.
The corresponding English language phrases:
: Risks
:: R: 34 ''Causes burns''
:: R: 37 ''Irritating to the respiratory system.''
: Safety
:: S: 26 ''In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.''
:: S: 36 ''Wear suitable protective clothing.''
:: S: 45 ''In case of accident or if you feel unwell, seek medical advice immediately (show label where possible).''
Dashes separate the phrase numbers. They are not to be confused with range indicators.
: Example: R: 34-37 ''Causes burns, irritating to the respiratory system.''
Slashes indicate fixed combinations of single phrases.
: Example: R: 36/37/38 ''Irritating to eyes, respiratory system and skin.''
More detailed hazard and safety information can be found in the material safety data sheets (MSDS) of a compound.

See also

★ MSDS

★ List of R-phrases

★ List of S-phrases

External links

★ List of R/S statements at Sigma-Aldrich

★ Australian hazardous substances information system

★ European Union commission directive 2001/59/EC (PDF)

★ European Chemical Bureau Classification and Labelling Homepage